It does really depend on your use. for wildlife where you are focal length limited, the 1D MK IV is the one to get. For low light and general usage, the 5D MK III edges it out.Its a hard choice, and comes down to how you use it.

It does really depend on your use. for wildlife where you are focal length limited, the 1D MK IV is the one to get. For low light and general usage, the 5D MK III edges it out.Its a hard choice, and comes down to how you use it.

Exactly. It's hard to be a pro and stay specific to one area. You'd never make enough money. So I can see why a lot do studio work and photojournalism. In that case, you almost have to have two cameras. My first combo was 5D Mark III and 1D Mark IV. I used the 5D3 for weddings and the 1D4 for track. I just had to.

It is said that 1D bodies have more accurate auto focus. Do you still think this is true regarding the 5D Mark III and 1D Mark IV? I've missed an awful lot of shots with the 1D4 whereas, I'm not kidding here, I haven't missed any with the 5D3. That was one of the reasons I have a second one, because the AF in low light was so good, I would bring two with me with different lenses. The 1D4 I missed an awful lot of track shots due to OOF. Just a thought that maybe this was improved in the 5D3?

It is said that 1D bodies have more accurate auto focus. Do you still think this is true regarding the 5D Mark III and 1D Mark IV? I've missed an awful lot of shots with the 1D4 whereas, I'm not kidding here, I haven't missed any with the 5D3. That was one of the reasons I have a second one, because the AF in low light was so good, I would bring two with me with different lenses. The 1D4 I missed an awful lot of track shots due to OOF. Just a thought that maybe this was improved in the 5D3?

I think that close to a million 5D MK III / D1 X cameras are now out there (Me too). The autofocus is a big step up for Canon The 1D MK IV is good, but the new AF is much better.